6 Operation
Linear actuators MC100 • MC103
Operating Manual Version 2.1 - March 2011 29
6 Operation
Prior to commissioning the linear actuator you will have to initialise it and select
the operating mode.
5 Commissioning on page 22
5.9 Initialising the path measuring system on page 27
6.1 Changing between manual and automatic mode
It is possible to run the linear actuator in automatic mode or manual mode
(manual adjustment).
• In automatic mode the spindle nut moves to the position set by the controller.
• In manual mode it is possible to set the spindle manually, e. g.for control
purposes. Output signal (X) is not available in manual mode.
How to change-over in manual mode
1 Move the hand wheel (36) to manual mode position by turning until the hand
wheel locks noticeably.
Risk of damage to valve and actuator during manual mode!
The valve may get damaged if it is pushed too hard into its receptacle during
manual mode.
• Do not try and keep turning the hand wheel when you realise that the required
effort increases noticeably!
• Never use force !
2 Use the hand wheel to turn the spindle nut to the desired position. Turn the hand
wheel until the preset potentiometer increases. Do not use force!
How to change-over in automatic mode
1 Push the hand wheel (36) to automatic mode position.
2 The linear actuator first moves to the position specified by encoding switch S6
and then to the position preset by the controller.
Automatic operation
36 Hand wheel
Manual operation
diagram 22 Selecting automatic mode
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